class_docstr: Implements Laplace (add one) smoothing.
  
  Initialization identical to BaseNgramModel because gamma is always 1.
code: def __init__(self, *args, **kwargs):
      super().__init__(1, *args, **kwargs)
  
imports: from nltk.lm.api import LanguageModel, Smoothing
  from nltk.lm.smoothing import AbsoluteDiscounting, KneserNey, WittenBell
label_desc: Use image node_id 1 to create a new Laplace object from inherited base classes: Lidstone with example: obj = Laplace()